The following reply was made to PR usb/181159; it has been noted by GNATS.

From: Roland Behme <r...@nugman.de>
To: bug-follo...@freebsd.org
Cc:  
Subject: Re: usb/181159: Problem attaching USB device
Date: Wed, 06 Nov 2013 16:02:10 +0100

 I think I have a similar problem with an ASRock H87 Pro4 mainboard here.
 First I tried with FreeBSD 9.2 RELEASE, then after I found this PR I
 switched to 9.2 STABLE in order to try the patch mentioned above.
 Unfortunately unlike for my fellow poster, it doesn't help in my case.
 
 When I enable the USB 3.0 feature in UEFI BIOS, the plugged in devices
 are not attached.
 
 This is what I get from dmesg:
 
 xhci0: <Intel Lynx Point USB 3.0 controller> mem 0xf0420000-0xf042ffff
 irq 16 at device 20.0 on pci0
 xhci0: 32 byte context size.
 xhci0: Port routing mask set to 0xffffffff
 usbus0 on xhci0
 [...]
 usbus0: 5.0Gbps Super Speed USB v3.0
 ugen0.1: <0x8086> at usbus0
 uhub0: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
 [...]
 Root mount waiting for: usbus0
 uhub0: 21 ports with 21 removable, self powered
 Root mount waiting for: usbus0
 xhci0: Port routing mask set to 0x00000000
 usb_alloc_device: device init 2 failed (USB_ERR_IOERROR, ignored)
 ugen0.2: <Unknown> at usbus0 (disconnected)
 uhub_reattach_port: could not allocate new device
 
 
 
 At least I'm able to use my USB devices when I disable USB 3.0 in UEFI
 BIOS. Then dmesg looks like this:
 
 ehci0: <EHCI (generic) USB 2.0 controller> mem 0xf0424000-0xf04243ff irq
 16 at device 26.0 on pci0
 usbus0: EHCI version 1.0
 usbus0 on ehci0
 [...]
 ehci1: <EHCI (generic) USB 2.0 controller> mem 0xf0423000-0xf04233ff irq
 23 at device 29.0 on pci0
 usbus1: EHCI version 1.0
 usbus1 on ehci1
 [...]
 usbus0: 480Mbps High Speed USB v2.0
 usbus1: 480Mbps High Speed USB v2.0
 ugen0.1: <Intel> at usbus0
 uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0
 ugen1.1: <Intel> at usbus1
 uhub1: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
 [...]
 Root mount waiting for: usbus1 usbus0
 uhub0: 2 ports with 2 removable, self powered
 uhub1: 2 ports with 2 removable, self powered
 Root mount waiting for: usbus1 usbus0
 ugen0.2: <vendor 0x8087> at usbus0
 uhub2: <vendor 0x8087 product 0x8008, class 9/0, rev 2.00/0.05, addr 2>
 on usbus0
 ugen1.2: <vendor 0x8087> at usbus1
 uhub3: <vendor 0x8087 product 0x8000, class 9/0, rev 2.00/0.05, addr 2>
 on usbus1
 uhub2: 6 ports with 6 removable, self powered
 uhub3: 8 ports with 8 removable, self powered
 ugen1.3: <American Power Conversion> at usbus1
 Root mount waiting for: usbus1
 ugen1.4: <Sunplus Technology Inc.> at usbus1
 umass0: <Bulk Only Interface> on usbus1
 umass0:  SCSI over Bulk-Only; quirks = 0x4101
 umass0:6:0:-1: Attached to scbus6
 
 
 So in EHCI mode everything is running, XHCI fails to attach the devices.
 Any suggestions?
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